Difference between Bimetallic Thermostat and Polymer PTC
PTC is a chemical principle application:
PTC is Polymeric Positive Temperature Coefficient acronym, PTC device that is the polymer temperature coefficient of positive devices, The device can be in the current surge is too large, When the temperature is too high to protect the circuit. When used, will be connected in series in the circuit, Under normal circumstances, its resistance is very small, Loss is also very small, Does not affect the circuit work;However, if overcurrent (such as short circuit) occurs, Its temperature rises, Its resistance followed by a sharp rise, To limit the role of current, To avoid damage to the circuit components. When troubleshooting, PTC device automatically drops the temperature, And return to low resistance state, Therefore PTC polymer is also called reducible fuse.
The polymer collective material in the thermistor will shrink due to cooling, Carbon black particles linked together, the resistance becomes smaller, The current can pass through the PTC thermistor normally. Polymer PTC thermistor must be troubleshooting, Can be reset. And this time you need to disconnect the circuit so that PTC thermistor cooling.
Bimetallic thermostat is a physical principle Application:
Bimetal also known as hot bimetal. Since the thermal expansion coefficients of the respective element layers are different, When the temperature changes, The deformation of the active layer is greater than the deformation of the passive layer, So that the entire bimetal is bent toward the passive layer side. The curvature of the composite material changes to cause deformation. Among them, the higher coefficient of expansion known as the active layer; The lower coefficient of expansion is called the passive layer. In fact, Those who rely on temperature change and physical change material combinations.
PTC self-recovery fuse and bimetallic device is not the same as the automatic reset. When the bimetal thermal protection, Will disconnect the current, The product will stop working, The temperature will drop, Reach the set temperature, Bimetallic will resume work, This is also typical of bimetallic device features:Even if the fault can not be reset can also be excluded, This results in non-stop switching between the fault state and the protection state, This may damage the device. butPolymer PTC thermistor will always remain in a high resistance state, Until troubleshooting.
For different customers, PTC and bimetallic products will be difficult to choose. If you have different problems can consult online sales. My company will give you a more perfect answer.
PTC is Polymeric Positive Temperature Coefficient acronym, PTC device that is the polymer temperature coefficient of positive devices, The device can be in the current surge is too large, When the temperature is too high to protect the circuit. When used, will be connected in series in the circuit, Under normal circumstances, its resistance is very small, Loss is also very small, Does not affect the circuit work;However, if overcurrent (such as short circuit) occurs, Its temperature rises, Its resistance followed by a sharp rise, To limit the role of current, To avoid damage to the circuit components. When troubleshooting, PTC device automatically drops the temperature, And return to low resistance state, Therefore PTC polymer is also called reducible fuse.
The polymer collective material in the thermistor will shrink due to cooling, Carbon black particles linked together, the resistance becomes smaller, The current can pass through the PTC thermistor normally. Polymer PTC thermistor must be troubleshooting, Can be reset. And this time you need to disconnect the circuit so that PTC thermistor cooling.
Bimetallic thermostat is a physical principle Application:
Bimetal also known as hot bimetal. Since the thermal expansion coefficients of the respective element layers are different, When the temperature changes, The deformation of the active layer is greater than the deformation of the passive layer, So that the entire bimetal is bent toward the passive layer side. The curvature of the composite material changes to cause deformation. Among them, the higher coefficient of expansion known as the active layer; The lower coefficient of expansion is called the passive layer. In fact, Those who rely on temperature change and physical change material combinations.
PTC self-recovery fuse and bimetallic device is not the same as the automatic reset. When the bimetal thermal protection, Will disconnect the current, The product will stop working, The temperature will drop, Reach the set temperature, Bimetallic will resume work, This is also typical of bimetallic device features:Even if the fault can not be reset can also be excluded, This results in non-stop switching between the fault state and the protection state, This may damage the device. butPolymer PTC thermistor will always remain in a high resistance state, Until troubleshooting.
For different customers, PTC and bimetallic products will be difficult to choose. If you have different problems can consult online sales. My company will give you a more perfect answer.
